"When sound hits an object, it causes small vibrations of the object’s surface. We show how, using only high-speed video of the object, we can extract those minute vibrations and partially recover the sound that produced them, allowing us to turn everyday objects—a glass of water, a potted plant, a box of tissues, or a bag of chips—into visual microphones."
http://people.csail.mit.edu/mrub/VisualMic/
Oh shit, there goes the neighborhood.
https://www.youtube.com/watch?v=GvGy4WIBfjo
